#include<bits/stdc++.h>
using namespace std;
#define N 100005
inline int read()
{
    int x=0;char ch;
    ch=getchar();
    while(ch>'9'||ch<'0') ch=getchar();
    while(ch>='0'&&ch<='9')
    {
        x=(x<<1)+(x<<3)+(ch^48);
        ch=getchar();
    }
    return x;
}
int main()
{
    freopen("arena.in","r",stdin);
    freopen("arena.out","w",stdout);

    return 0;
}
